The actor and model has defended her decision to have a baby in her fifties. [Photo: Instagram]

“But how many men have their first kids in their 60s and 70s and they never doubt it?”

Neilsen also has four adult children: Julian, 34, who she shares with first husband Kasper Winding, Killian, 28, with ex-fiance Mark Gastineau and Douglas, 25, and Raoul, 23, with fourth husband Raoul Meyer.

“Do I understand that [people] are a bit skeptical? Yes, I understand. I also totally respect the fact that not everybody likes it and agrees with it, but it is my life,” she says.

Nielsen says she froze her eggs at age 40 when she and Dessi first met.

“There is a huge disappointment. If you do IVF, 80 percent of the time, it doesn’t work. It’s that phone call going, ‘It’s negative.’ It’s the waiting. It’s a lot. It’s a big, big journey,” she told the publication.

“Another thing is it is expensive. It doesn’t come easy or cheap if you do it my way. I want people to know that.”

The first ever IVF baby, Louise Brown, celebrated her 40th birthday this week, heralding four decades of the breakthrough treatment.